Lubricating and cooling rotary bearings of axial blowers

摘要

In an axial blower, a plurality of blades are disposed around a hub and each blade is supported on a respective strut which is rotatable in a pair of radially separated bearings. An axially displaceable disk in the hub is connected with the blades for rotating them. The drive shaft for the rotor is hollow and delivers oil to the disk which in turn delivers it to the rotation levers of the struts. The oil moves successively to the bearings radially outward of the disk and accumulated oil is collected by a scoop at the radially outer bearing. The collected oil is delivered to a collection chamber and is recirculated by a pump back to the hollow shaft. An additional cooling circuit may be provided.